Internal Built-in Rohs 5G 4G LTE 3G 2.4G WIFI 2G IPEX U.FL Flexible FPC PCB Antenna  When the directional gain of the antenna decreases by 38dBi, the corresponding frequency range of the antenna. Any antenna has a band operating range. Different technologies, such as 1G, 2G, 3G, 4G, 5G, 6G. The farther the high gain antenna transmits the signal, the antenna produced by the company can be designed and produced according to the 1-38dBi gain